This product is for water fixtures and is compatible with single-lever faucets. It's an original water treatment adapter that combines water purification and energy saving features. A flow rate switching device is built into the center of the main adapter, providing energy savings with a 30-50% reduction in water usage. Furthermore, powerful neodymium magnets are placed on both sides of the main adapter, facing each other. As tap water passes through the magnetic field, the water molecules become clustered, resulting in finer particles and high-performance water. The key benefit is its gentleness on the skin, allowing for good penetration. It can be used for cooking water, drinking water, and is seeing increasing demand for health and amenity purposes. The focus was on a compact design, achieved through 3D printing. The size is 35 x 46 x 35mm, and the total weight is a light 62g. The material is PLA (polylactic acid, derived from corn and sugarcane), an environmentally friendly bio-resin. Neodymium magnets are fragile and prone to rust when exposed to water. They are surface-treated with nickel plating. To further enhance water resistance, they are coated with epoxy resin, after extensive research. The main adapter and flow rate switching device also use Florence Resin, which complies with the Food Sanitation Law (pl) and FDA standards, and has received high ratings for safety and yellowing resistance worldwide. ⚠️⚠️⚠️ Compatible with single-lever aerator heads (external thread and internal thread) caps. Please refer to the following installation video URL: http://d.kuku.lu/kk7s456de Please feel free to contact us.